DRAIN ARRANGEMENT FOR HEAT RECOVERY UNIT

摘要

There is provided a gas heat recovery unit comprising: two gas flow paths in heat exchange contact; a condensate drainage path for each of said two gas flow paths for draining condensate from the respective gas flow path, said two condensate drainage paths being fluidly connected to a common drainage outlet of the heat recovery unit; and each of said two condensate drainage paths comprising a valve which allows passage of liquid but not gas from the respective gas flow path towards the common drainage outlet. Providing a common drainage outlet simplifies installation and minimises the possibility of incorrect installation. It also permits switching the airflows within the unit without requiring any corresponding alteration to the drainage system.